IoT application Iot edge node is RasberryPi where run mqtt image On k8s cluster run mqtt broker and nodered to control rasberrypi.
Test mqtt k8s - kubectl exec (pod-id) -i -t -- mosquitto_sub -h localhost -v -t "testing/"
from rpi docker exec (container-id) mosquitto_pub -h 192.168.14.11 -p 30884 -t "testing/" -m "Testing bridged brokers!"